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(No.1 High-Tech News Site in Japanese)


News from NET and COM '99
















  • [NET & COM ’99] ADSL Featured in Fast Internet Access Demo
  • February 5, 1999 (TOKYO) — Demonstrations of high-speed access to the Internet using asymmetric digital subscriber line (ADSL) technology and cable modems highlighted the “Network Frontline: Home Corner” area at NET & COM ’99.
    The products in both demonstrations are equipped with the latest technology. They had their first unveiling in Japan at NET & COM ’99, a showcase of corporate systems and networking products which runs Feb. 3-5 at Makuhari Messe in Chiba prefecture near Tokyo.

    ADSL is a modem technology that enables data transmission over existing copper-wire cables at speeds of up to several megabits per second. Nippon Telegraph and Telephone Corp. (NTT) plans to offer an ADSL service called “ADSL Access Line” starting this fall.

    The main products demonstrated at NET & COM ’99 are leading-edge ADSL modems that conform to the G.992.2 standard (formerly “G.lite”) defined by the International Telecommunications Union (ITU-T). The G.992.2 specification, which NTT will adopt in ADSL Access Line, delivers data rates of up to 1.5Mbps downstream and up to 512kbps upstream.

    Also at the show was a personal computer from Compaq Computer Corp. equipped with a G.lite modem card from Aware Inc. of the United States. This computer can connect to the Internet via an ADSL line. G.lite modems from companies such as PairGain Technologies Inc. of the United States and Orckit Communications Ltd. of Israel are available too.

    Cable modems enable high-speed data transmission over a cable television (CATV) network. A succession of Internet-over-CATV services using cable modems have started operating in Japan. Attracted by the promise of rapid full-time access to the Internet for around 5,000 yen (US$45) per month, subscriber numbers are surging.

    The cable modems at the show meet the Data Over Cable Service Interface Specification (DOCSIS) 1.0 standard, and will start shipping this spring.

    DOCSIS is a cable modem standard defined by the Multimedia Cable Network System Partners’ (MCNS), an industry group of CATV operators. Subscribers share downstream bandwidth of 42Mbps and upstream bandwidth of 10Mbps.

    Nippon Motorola Ltd. is conducting its own demo using cable modems for high-speed Internet access.

    In addition, Soliton Systems KK is giving voice-over-IP (VoIP) demos, using a cable modem from 3Com Japan KK. Visitors can see for themselves how VoIP works over a cable infrastructure and test the voice quality.

    Related stories:
    ¥ Doubts Remain About NTT’s ADSL Service
    ¥ Nippon Telegraph and Telephone to Offer ADSL Service

    (Nikkei Communications)



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